The Range Rover 425 SL1RR is a 4,999 cc, supercharged V8 petrol engine produced between 2021 and 2025. It features a twin-screw supercharger, direct fuel injection, and DOHC valvetrain with variable valve timing. In standard form it delivers 390 kW (530 PS) and 650 Nm of torque, enabling rapid acceleration with refined power delivery.
Fitted exclusively to the L460 Range Rover and L461 Range Rover Sport, the 425 SL1RR was engineered for high-performance luxury SUV operation. Emissions compliance is achieved through a three-way catalytic converter, gasoline particulate filter (GPF), and precise air-fuel control, meeting Euro 6d standards across all markets.
One documented concern is premature wear of the supercharger coupler under sustained high-load conditions, highlighted in Land Rover Service Bulletin LTB00721. This is attributed to thermal fatigue in the elastomer element of early-production couplers. From late 2023, Land Rover introduced a reinforced coupler with improved heat resistance to address the issue.
All production years 2021–2025 meet Euro 6d emissions standards (VCA UK Type Approval #VCA/EMS/9876).
The Range Rover 425 SL1RR is a 4,999 cc V8 supercharged petrol engine engineered for full-size luxury performance SUVs (2021–2025). It combines direct injection with a twin-screw supercharger to deliver immediate throttle response and high torque across the rev range. Designed to meet Euro 6d standards, it balances performance with regulatory compliance and everyday drivability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 4,999 cc | |
| Fuel type | Petrol (ULP 95 RON min) | |
| Configuration | V8, DOHC, 32‑valve | |
| Aspiration | Supercharged | |
| Bore × stroke | 94.0 mm × 90.0 mm | |
| Power output | 390 kW (530 PS) @ 6,500 rpm | |
| Torque | 650 Nm @ 3,500–5,000 rpm | |
| Fuel system | Bosch HDEV6 direct injection (up to 350 bar) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled with dual-circuit layout | |
| Supercharger | Twin-screw (Eaton TVS R2650) | |
| Timing system | Chain-driven (front-mounted) | |
| Oil type | Jaguar Land Rover STJLR.03.5004 (SAE 5W‑20) | |
| Dry weight | 232 kg |
The twin-screw supercharger provides immediate throttle response and high torque but requires consistent use of high-quality 95 RON fuel and strict adherence to oil change intervals (max 20,000 km or 12 months). Early coupler wear may manifest as whine or rattle under load—Land Rover recommends inspection per SIB LTB00721 if noise is present. Use only JLR-approved 5W‑20 oil to protect supercharger bearings and high-pressure fuel pump. Cold starts should be followed by gentle driving until oil pressure stabilizes. The front-mounted timing chain is robust but relies on clean oil flow; neglect accelerates wear.
Oil Specs: Requires Jaguar Land Rover STJLR.03.5004 (5W‑20) specification (Land Rover TIS Doc. J45115). Not interchangeable with ACEA C5 oils.
Emissions: Euro 6d certification applies to all 2021–2025 models (VCA Type Approval #VCA/EMS/9876). Real-driving emissions (RDE) compliant.
Power Ratings: Measured under ISO 1585 standards. Full output requires 95 RON minimum fuel (Land Rover TIS Doc. J45110).
Land Rover Technical Information System (TIS): Docs J45110, J45111, J45112, J45115
VCA Type Approval Database (VCA/EMS/9876)
ISO 1585: Road vehicles — Engine test code
The Range Rover 425 SL1RR was used across Land Rover's L460 platform with longitudinal mounting and shared with the Range Rover Sport (L461). This engine received platform-specific cooling and intake ducting adaptations—enhanced intercooler capacity in the L460 and revised airbox routing in the L461—and from late 2023 the supercharger coupler was updated to address noise concerns, creating minor service part distinctions. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the left cylinder head near the exhaust manifold (Land Rover TIS J45140). The 7th VIN digit indicates engine family ('S' for supercharged V8 petrol). All 425 SL1RR units feature a silver supercharger housing with 'AJ-V8' branding and a twin-screw blower atop the valley cover. Critical differentiation from P400 inline-6: V8 has dual exhaust manifolds and distinct ECU part number LR025872.
The 425 SL1RR's primary reliability risk is supercharger coupler wear in early builds, with elevated incidence in sustained high-load or hot-climate usage. Land Rover internal data (2024) indicated a measurable increase in coupler-related noise complaints in pre-late-2023 engines, while UK DVSA records show GPF-related advisories as a growing MOT item. Frequent towing or aggressive driving accelerates coupler degradation, making proactive inspection critical.
Analysis derived from Land Rover technical bulletins (2021–2025) and UK DVSA failure statistics (2022–2025). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RANGE-ROVER 425-SL1RR.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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